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  1. Replies
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    Ford & Mazda Re: 2.2 Smoke at night

    all diesels do this, especially on acceleration. In normal operation diesels run very lean (hence the great fuel consumption), on acceleration they run richer creating more particulates. You usually...
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    Re: Malfunction during emergency?

    You are correct in that when the ABS system is working you should definitely NOT apply cadence braking, in your situation the ABS did not work so cadence braking was the next step to take.

    Glad...
  3. Re: RYOBI One Plus Cordless Range - Any good ?

    Its 2AH and 4AH as in Amp Hour and its a measure of the battery capacity and not power output as Prof pointed out
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    Re: Power upgrade on race car

    Fitted to the engine. Crank bolt is too long (its what I had in the garage) so fitting with the washers is temporary until I source the correct length bolt
    606740
    606741

    Water pump belt fitted...
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    Re: How does the 2.4 tow?

    No personal experience, but a friend bought a brand new Hilux 2.4 a few months later he towed his Jurgen Classic down to the Western Cape for the December holiday and during the holiday he traded it...
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    Re: Power upgrade on race car

    I love getting bits from the machine shop, crank pulley turned down to a single pulley and a drive slot milled into it

    606651

    Dry sump pump drive pulley milled with a tongue to engage the crank...
  7. Re: Headrest screen options for kids in backseat

    Tablet for each kid and a seagate goflex satellite in the car. Each kid streams what they want while listening with earphones and you have peace an quiet.

    Not the cheapest option but the best in...
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    Re: TO California or not?

    The dsg box does not like situations where you would normally slip the clutch (slowly pulling away or inching forward), in these scenarios its a horrible gearbox that either does nothing or goes to...
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    Re: someone needs to buy this, new SQ7

    One can hope that it comes to SA, but doubt it in the current economic climate

    https://www.caranddriver.com/reviews/a32044957/2020-vw-touareg-v8-tdi-drive/
  10. Replies
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    2,502

    Re: someone needs to buy this, new SQ7

    I have the birkin to scare me, for a road car I want something planted and stable at any speed. What I enjoy most about the Q7 is its overtaking ability, you see gap, tickle the pedal and before you...
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    Re: someone needs to buy this, new SQ7

    I remember reading about that a while ago, seemingly a big issue is with the switchgear longevity due to arcing and contact corrosion due to switching higher current. Canbus has also removed a lot of...
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    Re: someone needs to buy this, new SQ7

    the 48v is just for the blower and its there to fill in the gap to eliminate boost lag while the turbo's spool up, so you should have the throttle response of a NA petrol motor

    I assume they use a...
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    2,502

    Re: someone needs to buy this, new SQ7

    I wish, my Q7 needs to do duty for another 2-3 years before I can consider replacing (it will be around 250k km at that point). Until this was launched I had no idea what that could be as I kinda...
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    2,502

    someone needs to buy this, new SQ7

    someone needs to buy this now so I can upgrade in about 2 years time.

    https://www.carmag.co.za/news/new-models/refreshed-audi-sq7-with-900-nm-to-hit-sa-in-limited-numbers-soon/

    V8 twin turbo...
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    Re: Power upgrade on race car

    when you cant buy the right fitting, you make them. I need 3/4” npt to Jic -10 so made up my own

    606342
    (the angle is deliberate)
    606343
    Tig welding steel is SO much easier than ali. Really...
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    Re: Difflock vs Traction control

    No offroading as such, but just in normal use modern TC systems are really amazing. When we left Clarens (in the rain after a week of rain and lots of rain overnight) I was bit worried about the...
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    Re: Power upgrade on race car

    spent the first part of today removing the covers from the welder and cleaning all the switchgear with electrical contact cleaner. That seems to have done the trick and I have an AC tig again.
    ...
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    Re: Power upgrade on race car

    The dry sump oil tank that I have is too tall to fit in the chassis where I want to place it, so it needs to be cut shorter
    606033

    and rewelded
    606034

    cleaned it all up and started to weld...
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    Re: Power upgrade on race car

    It really is nice, did not do the costing on the material and runtime, but it would have been pricy to outsource this.

    With the strainers installed
    605849

    Because I'm running an external oil...
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    Re: New Ranger V6 diesel

    why waste your time on a V6 when you can drive a V8>:D

    believe me its zero ego, but 100% thrill of driving a powerful car. 8-)
  21. Replies
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    Re: Petrol na 12v power supply

    Ek kan geen rede sien hoekom dit nie kan werk nie. Jy moet kyk na die gearing om die alternators teen die regte spoed te draai en seker te maak die engine het woema wanneer jy die 100a wil gebruik.
  22. Replies
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    Re: Power upgrade on race car

    Can ran very well last year, in the last race I started having gear selection issues - suspect syncro's but there could be other damage as I'm pushing twice the power through the box that the stock...
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    Re: Engine conversions??

    done properly there is no reason why such a conversion will not be as (or more) reliable than the original engine. In a proper conversion the space, engine mounts, cooling capacity, wiring etc etc...
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    Re: Torque(Nm) and power(kW)

    weight of the rotating assembly has no bearing on the torque the engine produces. Energy is stored in rotating assembly so will affect how the power is delivered by smoothing out the power pulses...
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    Re: Torque(Nm) and power(kW)

    replace conrod length with piston stroke and you are spot on. Stroke is governed by crank throw as explained above
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    Re: Please recommend aircon installer - JHB

    Aircon Premier have done 2 installations for me, both samsung inverters and I'm very happy with the units and the service
    http://airconpremier.co.za/
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    Re: How many kilos on your car?

    Q7 4.2 TDI 190k km
    VW CC 2.0 TDI DSG 145k km

    nice to see a lot of people on the forum not scared of putting big mileage on their cars
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    Re: EZVIZ IP cameras

    I have a few of them around the house for a while now. Works very well and I can definitely recommend them.
  29. Replies
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    Re: Torque(Nm) and power(kW)

    think we are are trying to get to the same point.

    gearing does not change the power delivered, kw stays fixed (ignoring any parasitic losses) - not sure what you mean by delivered kw, what changes...
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    Re: Torque(Nm) and power(kW)

    because the higher the rpm the lower the torque the shaft is transmitting (see calc above)

    Go open up the gearbox for say a winch, first stage gears are tiny, they run at high speed but transfer...
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    Re: Torque(Nm) and power(kW)

    do not forget the impact of the gearbox on power delivery. a gearbox is a torque multiplyer

    Take 100nm at 4000rpm, thats 42kw

    put it through a gear ratio of 2:1 dropping the Rpm to 2000rpm, ...
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    Re: Torque(Nm) and power(kW)

    torque is the capacity to work, i.e. you need 200nm to turn a shaft.
    power is a measure of how quickly you can perform that work - i.e. how quickly you can turn that shaft by applying 200nm
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    Re: Torque(Nm) and power(kW)

    power at the wheels matter, its irrelevant if its from an engine at 8000rpm in a low gear or 2000rpm in a high gear or from a petrol or steam engine. The only time the power source matters is if you...
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    Re: Sunroof Shattered

    glass bends and bounces back - google some super slomo videos and you will be amazed how "flexible" it can be. Only if the glass is bent beyond its limit does it break.

    ...
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    Re: 4x4 Bus Dilemma

    sticking to the oil change intervals (60k on ours) is critical, do that you should be fine. I have heard of dsg failures, but no more than any other gearbox. Swambo’s car is now on 160k km and still...
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